Bi-fold knife



FIG. 1 is a front perspective view of a bi-fold knife, showing my newdesign in an open position;

FIG. 2 is a top plan view of the invention illustrated in FIG. 1;

FIG. 3 is a front elevation view of the invention illustrated in FIG. 1;

FIG. 4 is a bottom plan view of the invention illustrated in FIG. 1;

FIG. 5 is a rear elevation view of the invention illustrated in FIG. 1;

FIG. 6 is a left elevation view of the invention illustrated in FIG. 1;

FIG. 7 is a right elevation view of the invention illustrated in FIG. 1;

FIG. 8 is a front elevation view of the invention illustrated in FIG. 1,showing my new design in a closed position; and,

FIG. 9 is a rear elevation view of the invention illustrated in FIG. 8shown in a closed position.

The ornamental design for a bi-fold knife, as shown and described.